plus, the mystery man who triggered the fbi petraeus probe revealed. we're getting new information about who this veteran agent is and how he got involved. and a storm victim struggling to stay warm with no power for weeks gets a personal visit from the president of the united states. we want to welcome our viewers in the united states and around the world. i'm wolf blitzer. you're in "the situation room." >>> we've got breaking news. we're getting new information about what then-cia director david petraeus knew about the benghazi attack and when he knew it. let's get right to our pentagon correspondent barbara starr. barbara, what are you learning? >> wolf, i have just spoken to someone, a long-standing source who has spoken to david petraeus. this is someone on his level professionally. this person is directly familiar from petraeus with his thinking, with petraeus' thinking about what he will tell congress tomorrow about the benghazi attacks. david petraeus wants to tell congress that he knew almost immediately after the september 11th attacks that